The U.S. Geological Survey released this thermal map showing a close up of the northeastern end of the fissure system. Fissure 17 was producing a lava flow extending about 2 km (1.2 miles) from the east end of the fissure. The black and white area is the extent of the thermal map.
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Temperature in the thermal image is displayed as gray-scale values, with the brightest pixels indicating the hottest areas. The thermal map was constructed by stitching many overlapping oblique thermal images collected by a handheld thermal camera during a helicopter overflight of the flow field. The base is a copyrighted color satellite image (used with permission) provided by Digital Globe.
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